Wash the pig stomach carefully in clean water and then cut it into three or four large pieces. Place all the pieces in a large bowl; add around 2 tablespoons cooking wine and 2 tablespoons of cornstarch. Grasp carefully with hand for around 3 minutes. Wash again in running water. Repeat the process and until there is no sticky sauce on the surface. For the later process, you can reduce the amount of cooking wine and starch.
Bring a large pot, transfer the washed stomach into the pot, add 2 pieces of ginger, 1 scallion and 1 tablespoons cooking wine and enough water to cover the tripe. Bring all the content to a boiling and then simmer for around 20 to 30 minutes until a chop sticker can be inserted easily. Transfer out and cool down. Cut the cooked tripe into shreds.
Grate half of the ginger and chop the left. Cut red onion into small pieces and peppers into shreds.
Heat up cooking oil in wok, add ginger shreds, chopped scallion until aroma and then add shredded tripe to cook for 2 minutes. Add 1 tablespoon of cooking wine to continue cook for another minute.
Add red onion pieces, pepper shreds and ground pepper in. Stir-fry for around 2 minutes or until the pepper shreds become soft. And then add salt. Mix well and serve hot!